CVE-2026-46238

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-28. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 4 sources updated this week
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In the Linux kernel, the following vulnerability has been resolved:

batman-adv: stop caching unowned originator pointers in BAT IV

BAT IV keeps the last-hop neighbor address in each neigh_node, but some paths also cache an originator pointer derived from a temporary lookup. That pointer is not owned by the neigh_node and may no longer refer to a live originator entry after purge handling runs.

Stop storing the auxiliary originator pointer in the BAT IV neighbor state. When BAT IV needs the neighbor originator data, resolve it from the stored neighbor address and drop the reference again after use.

[sven: avoid bonding logic for outgoing OGM]

CVSS v3
8.8
EG Score
8.8(medium)
EPSS
17.7%
KEV
Not listed

Published

May 28, 2026

Last Modified

June 14, 2026

Advisory Details (8)

Auto-updated Jun 3, 2026
No patch confirmed yet.
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f03e8583532941b07761c5429de7d50766fa3110
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/aafcbaf1159ea224528ca4075d0ba8c10ef374af
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8c16c68fdbb69778f8d04f650340c3f4d1518f8e
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/86b2b58d7c228d850c8c78e4144e6123e8ed2718
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6e20700f8c524ac379ba8274ff5d453023b7c006
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/67bceeb22207f1f5a402973a3a0809e5f2698f38
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/384e3050a42be9085d50507b4d5f8266a588d742
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/09dc0d1a12222ffca6481916eab3cfea477b9620

Vendor Advisories for CVE-2026-46238(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 12× in last 7d / 91× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 203 total refreshes for this CVE.

  1. 2026-07-16 10:17 UTCEG score recompute
  2. 2026-07-16 10:17 UTCGHSA enrichment
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-13 22:30 UTCEPSS rescore
  6. 2026-07-13 06:13 UTCEPSS rescore
  7. 2026-07-12 05:46 UTCEPSS rescore
  8. 2026-07-11 20:30 UTCEG score recompute
  9. 2026-07-11 20:30 UTCVendor advisory
  10. 2026-07-11 20:30 UTCGHSA enrichment
  11. 2026-07-11 08:27 UTCEPSS rescore
  12. 2026-07-09 19:10 UTCEPSS rescore
  13. 2026-07-08 18:12 UTCEG score recompute
  14. 2026-07-08 18:12 UTCVendor advisory
  15. 2026-07-08 18:12 UTCGHSA enrichment
  16. 2026-07-08 15:16 UTCEPSS rescore
  17. 2026-07-07 13:46 UTCEPSS rescore
  18. 2026-07-06 16:27 UTCEPSS rescore
  19. 2026-07-06 02:23 UTCEPSS rescore
  20. 2026-07-05 02:30 UTCEPSS rescore
  21. 2026-07-04 06:31 UTCEPSS rescore
  22. 2026-07-02 14:11 UTCEG score recompute
  23. 2026-07-02 14:11 UTCVendor advisory
  24. 2026-07-02 14:11 UTCGHSA enrichment
  25. 2026-07-01 15:07 UTCEPSS rescore
Show 75 more
  1. 2026-07-01 14:20 UTCEG score recompute
  2. 2026-07-01 14:20 UTCVendor advisory
  3. 2026-07-01 14:20 UTCGHSA enrichment
  4. 2026-07-01 03:04 UTCEG score recompute
  5. 2026-07-01 03:04 UTCVendor advisory
  6. 2026-07-01 03:04 UTCGHSA enrichment
  7. 2026-06-30 23:22 UTCEPSS rescore
  8. 2026-06-30 01:53 UTCEG score recompute
  9. 2026-06-30 01:53 UTCVendor advisory
  10. 2026-06-30 01:53 UTCGHSA enrichment
  11. 2026-06-29 14:06 UTCEPSS rescore
  12. 2026-06-29 14:06 UTCEPSS rescore
  13. 2026-06-29 13:43 UTCEG score recompute
  14. 2026-06-29 13:43 UTCVendor advisory
  15. 2026-06-29 13:43 UTCGHSA enrichment
  16. 2026-06-28 16:34 UTCEG score recompute
  17. 2026-06-28 16:34 UTCVendor advisory
  18. 2026-06-28 16:34 UTCGHSA enrichment
  19. 2026-06-28 14:07 UTCEPSS rescore
  20. 2026-06-28 05:22 UTCEG score recompute
  21. 2026-06-28 05:22 UTCVendor advisory
  22. 2026-06-28 05:22 UTCGHSA enrichment
  23. 2026-06-28 04:56 UTCEPSS rescore
  24. 2026-06-28 04:56 UTCEPSS rescore
  25. 2026-06-27 18:10 UTCEG score recompute
  26. 2026-06-27 18:10 UTCVendor advisory
  27. 2026-06-27 18:10 UTCGHSA enrichment
  28. 2026-06-27 04:46 UTCEG score recompute
  29. 2026-06-27 04:46 UTCVendor advisory
  30. 2026-06-27 04:45 UTCGHSA enrichment
  31. 2026-06-27 03:08 UTCEPSS rescore
  32. 2026-06-26 16:49 UTCEG score recompute
  33. 2026-06-26 16:49 UTCVendor advisory
  34. 2026-06-26 16:49 UTCGHSA enrichment
  35. 2026-06-25 19:28 UTCEG score recompute
  36. 2026-06-25 19:28 UTCVendor advisory
  37. 2026-06-25 19:28 UTCGHSA enrichment
  38. 2026-06-25 13:49 UTCEPSS rescore
  39. 2026-06-25 08:16 UTCEG score recompute
  40. 2026-06-25 08:16 UTCVendor advisory
  41. 2026-06-25 08:16 UTCGHSA enrichment
  42. 2026-06-24 16:51 UTCEG score recompute
  43. 2026-06-24 16:51 UTCVendor advisory
  44. 2026-06-24 16:51 UTCGHSA enrichment
  45. 2026-06-24 14:05 UTCEPSS rescore
  46. 2026-06-23 21:33 UTCEPSS rescore
  47. 2026-06-23 21:33 UTCEPSS rescore
  48. 2026-06-22 14:25 UTCEPSS rescore
  49. 2026-06-22 14:25 UTCEPSS rescore
  50. 2026-06-21 14:56 UTCEPSS rescore
  51. 2026-06-21 14:56 UTCEPSS rescore
  52. 2026-06-21 01:59 UTCEPSS rescore
  53. 2026-06-21 01:59 UTCEPSS rescore
  54. 2026-06-19 19:26 UTCEPSS rescore
  55. 2026-06-19 19:26 UTCEPSS rescore
  56. 2026-06-18 17:52 UTCEPSS rescore
  57. 2026-06-18 17:52 UTCEPSS rescore
  58. 2026-06-18 01:26 UTCEG score recompute
  59. 2026-06-18 01:26 UTCVendor advisory
  60. 2026-06-18 01:26 UTCGHSA enrichment
  61. 2026-06-17 17:53 UTCEPSS rescore
  62. 2026-06-17 14:15 UTCEG score recompute
  63. 2026-06-17 14:15 UTCGHSA enrichment
  64. 2026-06-17 02:53 UTCEG score recompute
  65. 2026-06-17 02:53 UTCGHSA enrichment
  66. 2026-06-16 17:52 UTCEPSS rescore
  67. 2026-06-16 15:40 UTCEG score recompute
  68. 2026-06-16 15:40 UTCVendor advisory
  69. 2026-06-16 15:40 UTCGHSA enrichment
  70. 2026-06-16 01:15 UTCEG score recompute
  71. 2026-06-16 01:15 UTCVendor advisory
  72. 2026-06-16 01:15 UTCGHSA enrichment
  73. 2026-06-15 17:49 UTCEPSS rescore
  74. 2026-06-15 14:03 UTCEG score recompute
  75. 2026-06-15 14:03 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-46238?
CVE-2026-46238 is a high vulnerability published on May 28, 2026. In the Linux kernel, the following vulnerability has been resolved: batman-adv: stop caching unowned originator pointers in BAT IV BAT IV keeps the last-hop neighbor address in each neigh_node, but some paths also cache an originator pointer derived from a temporary lookup. That pointer is not…
When was CVE-2026-46238 disclosed?
CVE-2026-46238 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on June 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46238 actively exploited?
CVE-2026-46238 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46238?
CVE-2026-46238 has a CVSS v4.0 base score of 8.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-46238?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46238, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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